CN209544128U - A kind of non-maintaining load tap changing distribution transformer - Google Patents
A kind of non-maintaining load tap changing distribution transformer Download PDFInfo
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- CN209544128U CN209544128U CN201920368177.5U CN201920368177U CN209544128U CN 209544128 U CN209544128 U CN 209544128U CN 201920368177 U CN201920368177 U CN 201920368177U CN 209544128 U CN209544128 U CN 209544128U
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Abstract
The utility model provides a kind of non-maintaining load tap changing distribution transformer, wherein on-load voltage regulating switch includes: pressure regulation major loop and pressure regulation transition circuit, and the two is in parallel；It is provided with the major loop switching switch being sequentially connected electrically on pressure regulation major loop and major loop selects switching group, pressure regulation transits back road and is provided with transition loop switch switch, transition resistance and the transition loop choice switching group being sequentially connected electrically；Multiple shunting taps are drawn on high pressure lateral coil, are electrically connected after lead with the respective contacts in on-load voltage regulating switch.In the utility model, major loop selection switching group and transition loop choice switching group are all made of permanent-magnet linear driving mechanism, and energy consumption is lower, and structure is simple, and small in size, reliability is higher, is less prone to failure, and the service life is long.Meanwhile adjusting major loop switching switch to switch with transition loop switch and being made of vacuum interrupter, transformer oil will not be polluted during pressure regulation, without periodically carrying out oil strain or replacement filter core, has been achieved the purpose that non-maintaining.
Description
Technical field
The utility model relates to distribution transformer technical fields, and in particular to a kind of non-maintaining on-load voltage regulation distribution transformer
Device.
Background technique
Transformer regulating is to connect the tap of one lateral coil of transformer by tap changer tune to change the number of turns of coil, is reached
To the purpose for changing output voltage.Transformer regulating is divided into No-load changer and two kinds of on-load voltage regulation.Wherein, on-load voltage regulation is transformation
Device can change a kind of voltage regulating mode of voltage in load carrying by converting tap gear.
Traditional load tap changing distribution transformer carries out on-load voltage regulation using mechanical contact tap changer, and pressure regulation machinery touches
Head needs motor driven, therefore energy consumption is larger, is also easy to appear failure.In addition, mechanical contact tap changer volume is larger, need by
Inside transformer can be just attached it to after distribution transformer fuel tank up-sizing, causes transformer material weight to increase, transformation
Device becomes large-sized.
Therefore, urgently there is a kind of non-maintaining load tap changing distribution transformer that low energy consumption, small in size in this field.
Utility model content
The utility model is completed in order at least partly solve the technical problems existing in the prior art.
Solving technical solution used by the utility model technical problem is:
The utility model provides a kind of non-maintaining load tap changing distribution transformer, comprising: fuel tank, iron core, be wound on it is described
Low-voltage side coil and high pressure lateral coil on iron core, and the on-load voltage regulating switch being electrically connected with the high pressure lateral coil, wherein
The on-load voltage regulating switch includes: pressure regulation major loop and pressure regulation transition circuit, and the two is in parallel；It is provided on the pressure regulation major loop
The major loop switching switch and major loop being sequentially connected electrically select switching group, and the pressure regulation is transited back to be provided on the road and is successively electrically connected
Transition loop switch switch, transition resistance and the transition loop choice switching group connect；Multiple points are drawn on the high pressure lateral coil
Tap is connect, selects the respective contacts in switching group and the transition loop choice switching group electric with the major loop after lead
Connection, realizes on-load voltage regulation to change the tap output of the high pressure lateral coil by the on-load voltage regulating switch；The master
Loop switch switch is switched with the transition loop switch to be made of vacuum interrupter, the major loop selection switching group and institute
It states transition loop choice switching group and is all made of permanent-magnet linear driving mechanism.
Optionally, the high pressure lateral coil is in turn divided into basic coil L0, line pressure regulator along the direction of its head end to end
Enclose L3, voltage regulation coil L2 and voltage regulation coil L1, wherein basic coil L0 and voltage regulation coil L3 are directly electrically connected, voltage regulation coil L2 and
Voltage regulation coil L1 is directly electrically connected；5 conventional shunting taps are drawn on the high pressure lateral coil, respectively conventional shunting tap X1
To X5, wherein tie point extraction of the routine shunting tap X5 from the end of basic coil L0 and the head end of voltage regulation coil L3, conventional
Shunting tap X4 is drawn from the end of voltage regulation coil L3, and conventional shunting tap X3 is drawn from the head end of voltage regulation coil L2, and conventional point
It meets tap X2 to draw from the tie point of the end of voltage regulation coil L2 and the head end of voltage regulation coil L1, conventional shunting tap X1 is from pressure regulation
It draws the end of coil L1.
Optionally, the turn ratio of voltage regulation coil L3, voltage regulation coil L2 and voltage regulation coil L1 are 2:1:1.
Optionally, the major loop selection switching group includes: switch K1, switch K2 and switch K3, the transition circuit choosing
Selecting switching group includes: switch K4 and switch K5；Each switch in switch K1 to switch K5 includes: pressure regulation electromagnet and institute
The moving contact that pressure regulation electromagnet is connected is stated, and two static contacts to match with the moving contact, described two static contacts
Respectively upper contact head and lower contact, and the upper contact head and the lower contact are separately positioned on the two sides of the moving contact.
Optionally, in major loop selection switching group, the upper contact head of switch K1 is electrically connected with routine shunting tap X5,
Lower contact is electrically connected with routine shunting tap X4, moving contact is electrically connected with routine shunting tap X3；The upper contact head of switch K2 and often
Rule shunting tap X3 electrical connection, lower contact is electrically connected with routine shunting tap X2, moving contact is electrically connected with the upper contact head of switch K3；
The lower contact of switch K3 is electrically connected with routine shunting tap X1, moving contact is electrically connected with one end of major loop switching switch, and main
The other end of loop switch switch is electrically connected with the end of the high pressure lateral coil；Switch K1 to switch K3 is in no current state
Under selected；
In the transition loop choice switching group, the upper contact head of switch K4 is electrically connected with routine shunting tap X5, lower touching
Head is electrically connected with routine shunting tap X3, moving contact is electrically connected with the upper contact head of switch K5；The lower contact and routine point of switch K5
Connect tap X2 electrical connection, moving contact is electrically connected with one end of transition resistance R, and the other end of transition resistance R is cut with transition circuit
One end electrical connection of switch is changed, the other end of transition loop switch switch is electrically connected with the end of the high pressure lateral coil；Switch
K4 and switch K5 are selected under no current state.
Optionally, 11 coil taps for coil outer connection, respectively line are first drawn on the high pressure lateral coil
Enclose tap a1 to a11,11 coil taps be electrically connected respectively with described 5 conventional shunting taps according still further to predetermined manner with
Adjust coil ampere-turn equilibrium.
Optionally, basic coil L0 is divided into the more first part of the number of turns and the less second part of the number of turns, and basic
Power supply is accessed in one end of coil L0 first part；Voltage regulation coil L3 is divided into the identical first part of the number of turns and second part；
Coil tap a1 is electrically connected with the other end of basic coil L0 first part, coil tap a2 and voltage regulation coil L2's
One end electrical connection, coil tap a3 is electrically connected with the other end of voltage regulation coil L2, coil tap a4 and voltage regulation coil L3 first
Point one end electrical connection, coil tap a5 be electrically connected with the other end of voltage regulation coil L3 first part, coil tap a6 with substantially
One end of coil L0 second part is electrically connected, and coil tap a7 is electrically connected with the other end of basic coil L0 second part, coil
Tap a8 is electrically connected with one end of voltage regulation coil L1, and coil tap a9 is electrically connected with the other end of voltage regulation coil L1, coil tap
A10 is electrically connected with one end of voltage regulation coil L3 second part, the other end electricity of coil tap a11 and voltage regulation coil L3 second part
Connection；Wherein, coil tap a6 is electrically connected with coil tap a1, coil tap a7 and coil tap a4 electrical connection, coil tap
A3 is electrically connected with coil tap a8, and coil tap a5 is electrically connected with coil tap a10；
Conventional shunting tap X1 is electrically connected with coil tap a9；Conventional shunting tap X2 is electrically connected with coil tap a8；Often
Rule shunting tap X3 is electrically connected with coil tap a2；Conventional shunting tap X4 is electrically connected with coil tap a11；Conventional shunting tap
X5 is electrically connected with coil tap a7.
Optionally, two upper clamping pieces of the iron core are detachably connected with two cross-arms of interval pre-determined distance respectively,
And two cross-arms and two upper clamping pieces are arranged substantially perpendicular to each other；The on-load voltage regulating switch is placed on two cross-arms, and each cross
Installation attachment is provided between load and on-load voltage regulating switch, the installation attachment is for there is the on-load voltage regulating switch
Effect positioning.
Optionally, screw rod, the spiral shell are fixed at position corresponding with the cross-arm on two upper clamping pieces of the iron core
The first nut is cased on bar；Through-hole is provided on the cross-arm at position corresponding with the screw rod, the screw rod passes through described
After through-hole on cross-arm, is realized and locked by the second nut；First nut is for leveling the cross-arm.
Optionally, the distribution transformer further include: the side of fuel tank is arranged in the controller of on-load voltage regulating switch；
The control terminal of the on-load voltage regulating switch is electrically connected with secondary line, and the secondary line is upward through case lid, and passes through the case
The outlet box of tops, and the penetration pipe being connected between the outlet box and the controller, access the controller.
The utility model has the advantages that
1) on-load voltage regulating switch is small in size, is mounted in distribution transformer, does not change transformer conventional shape and volume, special
Not Shi Yongyu capacity 100kVA~630kVA distribution transformer, greatly save the production cost of on-load voltage regulation distribution transforming.
2) major loop switching switch is all made of special vacuum interrupter with transition loop switch switch, does not pollute transformer
Oil is not necessarily to periodic maintenance.
3) it is straight with transition loop choice switching group to be all made of permanent magnetism for the major loop selection switching group inside on-load voltage regulating switch
Line driving mechanism replaces the stored energy mechanism that volume is big, mechanical mechanism is complicated, and straight line driving mechanism structure is simple, without mechanical rapid wear
Part, high reliablity is non-maintaining, and the service life is long, and electrical endurance is up to 100,000 times.
4) high pressure lateral coil adjusts ampere-turn equilibrium by coil outer wiring, and stress is small when product short circuit.
5) on-load voltage regulating switch mounting means is simple, so that production efficiency is promoted.
Detailed description of the invention
Fig. 1 is the voltage-regulation principle schematic diagram of non-maintaining load tap changing distribution transformer provided by the embodiment of the utility model；
Fig. 2 a is the on-load voltage regulating switch tune of non-maintaining load tap changing distribution transformer provided by the embodiment of the utility model
First state schematic diagram when pressure；
Fig. 2 b be non-maintaining load tap changing distribution transformer provided by the embodiment of the utility model on-load voltage regulating switch from
The second status diagram when minimum shelves to secondary small shelves pressure regulation；
Fig. 2 c be non-maintaining load tap changing distribution transformer provided by the embodiment of the utility model on-load voltage regulating switch from
Third state schematic diagram when minimum shelves to secondary small shelves pressure regulation；
Fig. 2 d be non-maintaining load tap changing distribution transformer provided by the embodiment of the utility model on-load voltage regulating switch from
The 4th status diagram when minimum shelves to secondary small shelves pressure regulation；
Fig. 2 e be non-maintaining load tap changing distribution transformer provided by the embodiment of the utility model on-load voltage regulating switch from
The 5th status diagram when minimum shelves to secondary small shelves pressure regulation；
Fig. 2 f be non-maintaining load tap changing distribution transformer provided by the embodiment of the utility model on-load voltage regulating switch from
The 6th status diagram when minimum shelves to secondary small shelves pressure regulation；
Fig. 3 is the on-load voltage regulating switch pressure regulation of non-maintaining load tap changing distribution transformer provided by the embodiment of the utility model
Status diagram when to specified shelves；
Fig. 4 is the on-load voltage regulating switch pressure regulation of non-maintaining load tap changing distribution transformer provided by the embodiment of the utility model
Status diagram when to time big shelves；
Fig. 5 is the on-load voltage regulating switch pressure regulation of non-maintaining load tap changing distribution transformer provided by the embodiment of the utility model
Status diagram when to maximum；
Fig. 6 is that A phase high pressure lateral coil draws in non-maintaining load tap changing distribution transformer provided by the embodiment of the utility model
The schematic diagram of 11 coil taps out；
Fig. 7 is wiring schematic diagram of 11 coil taps shown in Fig. 6 respectively with 5 conventional shunting taps；
Fig. 8 a is specific wiring schematic diagram of the structure in on-load voltage regulating switch pressure regulation to minimum shelves shown in Fig. 7；
Fig. 8 b is specific wiring schematic diagram of the structure in on-load voltage regulating switch pressure regulation to secondary small shelves shown in Fig. 7；
Fig. 8 c is specific wiring schematic diagram of the structure in on-load voltage regulating switch pressure regulation to specified shelves shown in Fig. 7；
Fig. 8 d is specific wiring schematic diagram of the structure in on-load voltage regulating switch pressure regulation to secondary big shelves shown in Fig. 7；
Fig. 8 e is specific wiring schematic diagram of the structure in on-load voltage regulating switch pressure regulation to maximum shown in Fig. 7；
Fig. 9 is that each phase high pressure lateral coil draws in non-maintaining load tap changing distribution transformer provided by the embodiment of the utility model
Line is lifted one's head and mode of connection schematic diagram；
Figure 10 is that the on-load voltage regulating switch of non-maintaining load tap changing distribution transformer provided by the embodiment of the utility model is pacified
Fill schematic diagram；
Figure 11 is the on-load voltage regulating switch of non-maintaining load tap changing distribution transformer provided by the embodiment of the utility model
Controller scheme of installation.
In figure: 1- on-load voltage regulating switch；2- installs attachment；3- cross-arm；4- upper clamping piece；5- control terminal；6- spiral shell
Bar；7- fuel tank；8- outlet box；9- controller；10- penetration pipe.
Specific embodiment
To make those skilled in the art more fully understand the technical solution of the utility model, with reference to the accompanying drawings and examples
The utility model is described in further detail.
The utility model embodiment provides a kind of non-maintaining load tap changing distribution transformer comprising: fuel tank, iron core, around
Three-phase low-voltage lateral coil and three-phase high-voltage lateral coil of the system on iron core, and what is be electrically connected with three-phase high-voltage lateral coil have load to adjust
It compresses switch.It in the present embodiment, is described by taking three-phase transformer as an example, certainly, single-phase transformer and polyphase transformer also should be
In the protection scope of the utility model.
Wherein, on-load voltage regulating switch includes: three phase voltage regulating major loop and three phase voltage regulating transition circuit, every phase pressure regulation major loop
It is in parallel with corresponding phase pressure regulation transition circuit；The major loop switching switch being sequentially connected electrically is provided on every phase pressure regulation major loop
Switching group is selected with major loop, every phase pressure regulation transits back road and is provided with the transition loop switch switch being sequentially connected electrically, mistake
Cross resistance R and transition loop choice switching group.Draw multiple shunting taps on every phase high pressure lateral coil, after lead with it is corresponding
Respective contacts electrical connection in the major loop selection switching group and transition loop choice switching group of phase, to pass through on-load voltage regulating switch
Change the tap output of each phase high pressure lateral coil to change the no-load voltage ratio of high-voltage coil and low-voltage coil, to realize on-load voltage regulation, when pressure regulation, with
Each phase low-voltage side coil output end voltage is as pressure regulation criterion.Major loop switching switch is with transition loop switch switch by vacuum
Arc-chutes are constituted, and major loop selection switching group and transition loop choice switching group are all made of permanent-magnet linear driving mechanism.
In the present embodiment, the major loop selection switching group in pressure regulation major loop and the transition circuit in pressure regulation transition circuit are selected
It selects switching group and is all made of permanent-magnet linear driving mechanism, without using motor driven, therefore energy consumption is lower, and structure is simple, and it is small in size,
Reliability is higher, is less prone to failure, so that the service life of on-load voltage regulating switch is extended.Meanwhile in pressure regulation major loop
Major loop switching switch is switched with the transition loop switch in pressure regulation transition circuit to be made of vacuum interrupter, so that there is load to adjust
Electric arc will not be generated during pressure, do not pollute transformer oil, avoid the oil carbonization problem as caused by electric arc, without periodically into
Row oil strain or replacement filter core, have achieved the purpose that non-maintaining.In addition, the components that on-load voltage regulating switch uses are less, so it is whole
Body small volume.
Specifically, as shown in Figure 1, every phase high pressure lateral coil is in turn divided into basic coil along the direction of its head end to end
L0, voltage regulation coil L3, voltage regulation coil L2 and voltage regulation coil L1 are adjusted wherein basic coil L0 and voltage regulation coil L3 are directly electrically connected
Crimping circle L2 and voltage regulation coil L1 are directly electrically connected.5 conventional shunting taps, respectively conventional tap are drawn on high pressure lateral coil
Tap X1 to X5, wherein routine shunting tap X5 draws from the end of basic coil L0 and the tie point of the head end of voltage regulation coil L3
Out, conventional shunting tap X4 is drawn from the end of voltage regulation coil L3, and conventional shunting tap X3 is drawn from the head end of voltage regulation coil L2,
Conventional shunting tap X2 is drawn from the tie point of the end of voltage regulation coil L2 and the head end of voltage regulation coil L1, conventional shunting tap X1
It is drawn from the end of voltage regulation coil L1.
Although Fig. 1 is illustrated only three-phase transformer and connected using triangle, the utility model is not limited to this, and star connects
It connects or other kinds of connection type, also answers within the protection scope of the present utility model.
More preferably, the turn ratio of voltage regulation coil L3, voltage regulation coil L2 and voltage regulation coil L1 are 2:1:1.
Further, major loop selection switching group includes: switch K1, switch K2 and switch K3, transition loop choice switch
Group includes: switch K4 and switch K5.Each switch in switch K1 to switch K5 includes: pressure regulation electromagnet and pressure regulation electromagnetism
The moving contact of iron phase connection, and two static contacts to match with moving contact, two static contacts are respectively upper contact head and lower touching
Head, and upper contact head and lower contact are separately positioned on the two sides of moving contact.
The on-load voltage regulation of three-phase transformer described in the present embodiment is mainly to pass through the master adjusted in each phase pressure regulation major loop to return
Road selects switching group to realize.In each switch, moving contact moves under the electromagnetic force of pressure regulation electromagnet, and upper contact head is under
Contact be it is static, by moving contact and upper contact head or lower contact, realize switch on and off, and then realize that voltage is adjusted.
Wherein, in major loop selection switching group, the upper contact head of switch K1 is electrically connected with routine shunting tap X5, lower contact
It is electrically connected with conventional shunting tap X4, moving contact is electrically connected with routine shunting tap X3；The upper contact head of switch K2 and conventional tap
Tap X3 electrical connection, lower contact is electrically connected with routine shunting tap X2, moving contact is electrically connected with the upper contact head of switch K3；Switch K3
Lower contact be electrically connected with routine shunting tap X1, one end of moving contact and major loop switching switch D2 are electrically connected, and major loop
The other end of switching switch D2 is electrically connected with the end of high pressure lateral coil；Switch K1 to switch K3 is carried out under no current state
Selection；
In transition loop choice switching group, the upper contact head of switch K4 is electrically connected with routine shunting tap X5, lower contact with
Conventional shunting tap X3 electrical connection, moving contact are electrically connected with the upper contact head of switch K5；The lower contact of switch K5 and conventional tap are taken out
Head X2 electrical connection, moving contact are electrically connected with one end of transition resistance R, and the other end of transition resistance R is opened with transition loop switch
One end electrical connection of D1 is closed, the other end of transition loop switch switch D1 is electrically connected with the end of high pressure lateral coil；Switch K4 and
Switch K5 is selected under no current state.
Before pressure regulation, major loop switches switch D2 and connects, and transition loop switch switch D1 is disconnected.When needing pressure regulation, transition
Switch K4 and switch K5 in loop choice switching group are selected under no current state, then switch transition loop switch
D1 is connected, so that the pressure regulation transition circuit with transition resistance R is connected, guarantees the stabilization of voltage when transition；It is then turned off master
Loop switch switch D2, major loop select switch K1, K2 and K3 in switching group to be selected in no current, have selected
Cheng Hou first connects major loop and switches switch D2, then disconnects transition loop switch switch D1, and so far pressure regulation is completed.Entire pressure regulation
Journey, pressure regulation major loop and disconnection, the connection in pressure regulation transition circuit carry out in vacuum interrupter, and no electric arc is in transformer oil
It generates, it is pollution-free to transformer oil.
Below with reference to Fig. 2 a to Fig. 2 f, the process that the on-load voltage regulating switch is adjusted to time small shelves from minimum shelves is described in detail
In six states experienced.
As shown in Figure 2 a, first state: transition loop switch switch D1 is disconnected, so that pressure regulation transition circuit disconnects；It is main
Loop switch switch D2 is connected, so that pressure regulation major loop is connected, the moving contact of switch K1 is contacted with upper contact head at this time, switch K2
Moving contact contacted with upper contact head, the moving contact of switch K3 is contacted with upper contact head, therefore voltage regulation coil L1, L2 and L3 do not connect
Enter.Gear state when first state is minimum shelves operation.
As shown in Figure 2 b, the second state: transition loop switch switch D1 is turned on major loop switching switch D2, so that
Pressure regulation transition circuit is turned on pressure regulation major loop.
As shown in Figure 2 c, the third state: transition loop switch switch D1 is still connected, so that pressure regulation transition circuit still connects
It is logical, and major loop switching switch D2 is disconnected, so that pressure regulation major loop disconnects, is individually powered by pressure regulation transition circuit at this time, i.e.,
It first connects D1 and disconnects D2 again, to guarantee that pressure regulation process does not power off.
As shown in Figure 2 d, the 4th state: transition loop switch switch D1 is still connected, so that pressure regulation transition circuit still connects
Logical, major loop switching switch D2 is still off, so that pressure regulation major loop is still off, the moving contact of switch K2 is adjusted to and lower contact
Contact, is individually powered by pressure regulation transition circuit at this time.It is disconnected in transition loop switch switch D1 connection, major loop switching switch D2
When, the equal no current of switch K1 to K3, the moving contact that can arbitrarily adjust them is contacted with which static contact, i.e., in no current situation
Under selected.
As shown in Figure 2 e, the 5th state: transition loop switch switch D1 is turned on major loop switching switch D2, so that
Pressure regulation transition circuit is turned on pressure regulation major loop, and at this time since the moving contact of switch K1 is contacted with upper contact head, switch K2's is dynamic
Contact and lower contact, the moving contact of switch K3 are contacted with upper contact head, therefore voltage regulation coil L2 is accessed.
As shown in figure 2f, the 6th state: transition loop switch switch D1 is disconnected, so that pressure regulation transition circuit disconnects；It is main
Loop switch switch D2 is connected, so that pressure regulation major loop is connected, i.e., is first connected D2 and is disconnected D1 again to guarantee not power off, adjust at this time
Crimping circle L2 access, gear shift are completed.6th state is gear state when time small shelves are run.
Above-mentioned six state continuous actions, so that on-load voltage regulating switch completes pressure regulation (gear shift) process, it is entire to adjust
There is no power-off during pressure, also generate without electric arc in oil.The conversion of other gears is similar, no longer superfluous in the present embodiment
It states.
Fig. 3 show the on-load voltage regulating switch using it is aforementioned transfer the files mode pressure regulation to specified shelves when status diagram；
Fig. 4 show the on-load voltage regulating switch using it is aforementioned transfer the files mode pressure regulation to secondary big shelves when status diagram；Fig. 5 is shown
The on-load voltage regulating switch using it is aforementioned transfer the files mode pressure regulation to maximum when status diagram.
Inventor also found that national grid has resistance to shorting requirement to distribution transforming product at present, and will do it pumping to arrival product
Inspection.And the performance boost of product resistance to shorting mainly two aspect, one is exactly structural strengthening, secondly be exactly to coil progress ampere-turn
Balanced adjustment prevents coil from deforming in short circuit to reduce the short-circuit force that coil is generated in short circuit.
Ampere-turn is exactly the engineering metering unit of magnetomotive force produced by coil, the electric current passed through equal to coil turn and coil
Product, number of ampere turns is bigger, and the magnetic field of generation is stronger.Since magnetic potential is equal to the product of the amperage of electric current and the number of turns of coil, because
This, ampere-turn equilibrium is also known as magnetic potential balance.Magnetic potential Fm can be according to required iron core magnetic flux Ф and the total magnetic resistance Rm of iron circuit
It calculates, i.e. Fm=I × N=Ф × Rm.Wherein, N is the number of turns of coil, and I is the electric current for flowing through coil.
There is following influence to the safe operation of transformer in ampere-turn imbalance:
1) ampere-turn imbalance keeps Leakage flux distribution unbalanced, and width generates additional shaft to the magnetic flux leakage additionally generated in coil
Outward force, the direction of these power always increase the asymmetry for generating these power；Additional axial force and normal width are to leakage field
Generated axial direction internal force is the same, is bent line cake to vertical direction, and the cushion block between compressed lines cake, in addition to this, additional shaft
Outward force also partly or wholly passes in iron yoke, makes every effort to occur line cake away from stem to deformation in the middle part of winding or turn over
Turn phenomenon；
2) line cake is to make every effort to ampere-turn equilibrium or the tap due insulation distance in section, often to increase more cushion block, compared with
Thick cushion block causes the transmitting of power to be delayed, thus hits to line cake also larger；
3) it cannot ensure middle core height alignment after winding suit, cause to be further exacerbated by ampere-turn imbalance；
4) transformer station high-voltage side bus for a period of time after, thicker cushion block natural shrinking amount is larger, and it is uneven on the one hand to aggravate ampere-turn
On the other hand phenomenon is aggravated by beating when short-circuit force.
In order to realize ampere-turn equilibrium, technical solution used by the present embodiment specifically:
As shown in Figure 6 and Figure 7,11 coil taps for coil outer connection are first drawn on high pressure lateral coil, respectively
For coil tap a1 to a11, this 11 coil taps are electrically connected with described 5 conventional shunting taps respectively according still further to predetermined manner
To adjust coil ampere-turn equilibrium, short-circuit force is reduced.In other words, high-pressure side lead-out wires of coil is adjusted through ampere-turn equilibrium, is become with enhancing
Depressor body resistance to shorting performance.
Specifically, basic coil L0 is divided into the more first part of the number of turns and the less second part of the number of turns, and basic
Power supply is accessed in one end of coil L0 first part；Voltage regulation coil L3 is divided into the identical first part of the number of turns and second part.This
In embodiment, the first part of basic coil L0 includes 25 circle coils including 1042 circle coils, second part；Voltage regulation coil L1 packet
Include 28 circle coils；Voltage regulation coil L2 includes 28 circle coils；The first part of voltage regulation coil L3 includes 28 circle coils, second part
Including 28 circle coils.As shown in fig. 7, there is shown with number 25,28,28,28,28 and 25 respectively indicate coiling when reality
Border the number of turns.
Coil tap a1 is electrically connected with the other end of basic coil L0 first part, coil tap a2 and voltage regulation coil L2's
One end electrical connection, coil tap a3 is electrically connected with the other end of voltage regulation coil L2, coil tap a4 and voltage regulation coil L3 first
Point one end electrical connection, coil tap a5 be electrically connected with the other end of voltage regulation coil L3 first part, coil tap a6 with substantially
One end of coil L0 second part is electrically connected, and coil tap a7 is electrically connected with the other end of basic coil L0 second part, coil
Tap a8 is electrically connected with one end of voltage regulation coil L1, and coil tap a9 is electrically connected with the other end of voltage regulation coil L1, coil tap
A10 is electrically connected with one end of voltage regulation coil L3 second part, the other end electricity of coil tap a11 and voltage regulation coil L3 second part
Connection；Wherein, coil tap a6 is electrically connected with coil tap a1, coil tap a7 and coil tap a4 electrical connection, coil tap
A3 is electrically connected with coil tap a8, and coil tap a5 is electrically connected with coil tap a10；
Conventional shunting tap X1 is electrically connected with coil tap a9；Conventional shunting tap X2 is electrically connected with coil tap a8；Often
Rule shunting tap X3 is electrically connected with coil tap a2；Conventional shunting tap X4 is electrically connected with coil tap a11；Conventional shunting tap
X5 is electrically connected with coil tap a7.
Below with reference to Fig. 8 a to Fig. 8 e, the on-load voltage regulating switch is described in detail and is adjusted to minimum shelves, secondary small shelves, volume respectively
Determine the mode of connection of coil tap and conventional shunting tap when shelves, secondary big shelves and maximum.
As shown in Figure 8 a, gear state when running as minimum shelves: transition loop switch switch D1 is disconnected, so that adjusting
It presses through and crosses circuit disconnection；Major loop switch switch D2 connect so that pressure regulation major loop connect, at this time the moving contact of switch K1 and
Upper contact head contact, the moving contact of switch K2 are contacted with upper contact head, and the moving contact of switch K3 is contacted with upper contact head, therefore voltage regulation coil
L1, L2 and L3 are not accessed.At this point, high pressure lateral coil is drawn from conventional shunting tap X5, the mode of connection specifically: high-pressure side
The head end of coil is electrically connected with one end of basic coil L0 first part, and the other end and coil of basic coil L0 first part are taken out
Head a1 electrical connection, coil tap a1 is also electrically connected with coil tap a6, coil tap a6 also with basic coil L0 second part
One end electrical connection, the other end of basic coil L0 second part are electrically connected with coil tap a7, and coil tap a7 also divides with conventional
Tap X5 electrical connection is connect, can be seen that high pressure lateral coil ampere-turn symmetrically i.e. ampere-turn equilibrium from Fig. 8 a.
As shown in Figure 8 b, gear state when running as secondary small shelves: transition loop switch switch D1 is disconnected, so that adjusting
It presses through and crosses circuit disconnection；Major loop switch switch D2 connect so that pressure regulation major loop connect, at this time the moving contact of switch K1 and
Upper contact head contact, the moving contact of switch K2 and lower contact, the moving contact of switch K3 is contacted with upper contact head, therefore only line pressure regulator
Enclose L2 access.At this point, high pressure lateral coil is drawn from conventional shunting tap X3, the mode of connection specifically: the head of high pressure lateral coil
End is electrically connected with one end of basic coil L0 first part, and the other end and the coil tap a1 of basic coil L0 first part are electrically connected
It connects, coil tap a1 is also electrically connected with coil tap a6, and the one end of coil tap a6 also with basic coil L0 second part is electrically connected
Connect, the other end of basic coil L0 second part is electrically connected with coil tap a7, coil tap a7 also with conventional shunting tap X5
Electrical connection, conventional shunting tap X5 are also electrically connected with conventional shunting tap X2, and conventional shunting tap X2 is also electric with coil tap a3
Connection, coil tap a3 are also electrically connected with the other end of voltage regulation coil L2, and one end and the coil tap a2 of voltage regulation coil L2 is electrically connected
It connects, coil tap a2 is also electrically connected with conventional shunting tap X3, can be seen that high pressure lateral coil ampere-turn symmetrically i.e. ampere-turn from Fig. 8 b
Balance.
As shown in Figure 8 c, gear state when running as specified shelves: transition loop switch switch D1 is disconnected, so that adjusting
It presses through and crosses circuit disconnection；Major loop switch switch D2 connect so that pressure regulation major loop connect, at this time the moving contact of switch K1 and
Lower contact, the moving contact of switch K2 are contacted with upper contact head, and the moving contact of switch K3 is contacted with upper contact head, therefore only line pressure regulator
Enclose L3 access.At this point, high pressure lateral coil is drawn from conventional shunting tap X4, the mode of connection specifically: the head of high pressure lateral coil
End is electrically connected with one end of basic coil L0 first part, and the other end and the coil tap a1 of basic coil L0 first part are electrically connected
It connects, coil tap a1 is also electrically connected with coil tap a6, and the one end of coil tap a6 also with basic coil L0 second part is electrically connected
It connects, the other end of basic coil L0 second part is electrically connected with coil tap a7, and coil tap a7 is also electrically connected with coil tap a4
Connect, coil tap a4 is also electrically connected with one end of voltage regulation coil L3 first part, the other end of voltage regulation coil L3 first part with
Coil tap a5 electrical connection, coil tap a5 is also electrically connected with coil tap a10, coil tap a10 also with voltage regulation coil L3 the
One end of two parts is electrically connected, and the other end of voltage regulation coil L3 second part is electrically connected with coil tap a11, coil tap a11
It is also electrically connected with conventional shunting tap X4, can be seen that high pressure lateral coil ampere-turn symmetrically i.e. ampere-turn equilibrium from Fig. 8 c.
As shown in figure 8d, gear state when running as secondary big shelves: transition loop switch switch D1 is disconnected, so that adjusting
It presses through and crosses circuit disconnection；Major loop switch switch D2 connect so that pressure regulation major loop connect, at this time the moving contact of switch K1 and
Lower contact, the moving contact of switch K2 and lower contact, the moving contact of switch K3 is contacted with upper contact head, therefore voltage regulation coil
L2 and L3 access.At this point, high pressure lateral coil is drawn from conventional shunting tap X2, the mode of connection specifically: high pressure lateral coil
Head end is electrically connected with one end of basic coil L0 first part, the other end and coil tap the a1 electricity of basic coil L0 first part
Connection, coil tap a1 are also electrically connected with coil tap a6, and coil tap a6 is also electric with one end of basic coil L0 second part
Connection, the other end of basic coil L0 second part are electrically connected with coil tap a7, and coil tap a7 is also electric with coil tap a4
Connection, coil tap a4 are also electrically connected with one end of voltage regulation coil L3 first part, the other end of voltage regulation coil L3 first part
Be electrically connected with coil tap a5, coil tap a5 is also electrically connected with coil tap a10, coil tap a10 also with voltage regulation coil L3
One end of second part is electrically connected, and the other end of voltage regulation coil L3 second part is electrically connected with coil tap a11, coil tap
A11 is also electrically connected with conventional shunting tap X4, and conventional shunting tap X4 is also electrically connected with conventional shunting tap X3, and conventional tap is taken out
Head X3 is also electrically connected with coil tap a2, and coil tap a2 is also electrically connected with one end of voltage regulation coil L2, and voltage regulation coil L2's is another
One end is electrically connected with coil tap a3, and coil tap a3 is also electrically connected with conventional shunting tap X2, can be seen that high pressure from Fig. 8 d
Lateral coil ampere-turn is symmetrically ampere-turn equilibrium.
As figure 8 e shows, gear state when running as maximum: transition loop switch switch D1 is disconnected, so that adjusting
It presses through and crosses circuit disconnection；Major loop switch switch D2 connect so that pressure regulation major loop connect, at this time the moving contact of switch K1 and
Lower contact, the moving contact of switch K2 are contacted with upper contact head, the moving contact of switch K3 and lower contact, therefore voltage regulation coil
L1, L2 and L3 are all accessed.At this point, high pressure lateral coil is drawn from conventional shunting tap X1, the mode of connection specifically: high-pressure side
The head end of coil is electrically connected with one end of basic coil L0 first part, and the other end and coil of basic coil L0 first part are taken out
Head a1 electrical connection, coil tap a1 is also electrically connected with coil tap a6, coil tap a6 also with basic coil L0 second part
One end electrical connection, the other end of basic coil L0 second part are electrically connected with coil tap a7, and coil tap a7 also takes out with coil
Head a4 electrical connection, coil tap a4 are also electrically connected with one end of voltage regulation coil L3 first part, voltage regulation coil L3 first part
The other end is electrically connected with coil tap a5, and coil tap a5 is also electrically connected with coil tap a10, coil tap a10 also with pressure regulation
One end of coil L3 second part is electrically connected, and the other end of voltage regulation coil L3 second part is electrically connected with coil tap a11, coil
Tap a11 is also electrically connected with conventional shunting tap X4, and conventional shunting tap X4 is also electrically connected with conventional shunting tap X3, and conventional point
It meets tap X3 to be also electrically connected with coil tap a2, coil tap a2 is also electrically connected with one end of voltage regulation coil L2, voltage regulation coil L2
The other end be electrically connected with coil tap a3, coil tap a3 is also electrically connected with coil tap a8, coil tap a8 also with pressure regulation
One end of coil L1 is electrically connected, and the other end of voltage regulation coil L1 is electrically connected with coil tap a9, and coil tap a9 also divides with conventional
Tap X1 electrical connection is connect, can be seen that high pressure lateral coil ampere-turn symmetrically i.e. ampere-turn equilibrium from Fig. 8 e.
In conclusion all gear ampere-turn equilibriums of transformer have very well, so the transformer of above-mentioned tap mode is selected to exist
When short-circuit test advantageously.
Fig. 9 shows each phase high-pressure side coil lead and lifts one's head and mode of connection, i.e., transformer coil is practical lift one's head after connect
Line mode guarantees its resistance to shorting performance using the ampere-turn equilibrium of such mode of connection adjustable transformer coil.
In addition, as shown in Figure 10, two upper clamping pieces 4 of iron core are detachable with two cross-arms 3 of interval pre-determined distance respectively
Ground connection, and two cross-arms 3 and two upper clamping pieces 4 are arranged substantially perpendicular to each other.On-load voltage regulating switch 1 is placed on two cross-arms 3, and
Be provided between each cross-arm 3 and on-load voltage regulating switch 1 installation attachment 2, installation attachment 2 be used for on-load voltage regulating switch 1 into
Row effective position.
As it can be seen that on-load voltage regulating switch 1 is mounted on transformer upper clamping piece 4, and it is easy to operate, it improves work efficiency.
Specifically, it is fixed with screw rod 6 at position corresponding with cross-arm 3 on two upper clamping pieces 4 of iron core, can weld in cross
In load 3, the first nut is cased on screw rod 6.Through-hole is provided on cross-arm 3 at position corresponding with screw rod 6, screw rod 6 passes through cross-arm 3
On through-hole after, pass through the second nut realize locking.Wherein, the first nut is for leveling cross-arm 3.
As shown in figure 11, the distribution transformer further include: the controller 9 of on-load voltage regulating switch 1 is arranged in fuel tank 7
Side.The control terminal 5 of on-load voltage regulating switch 1 is electrically connected with secondary line, and secondary line is upward through case lid, and passes through case lid top
The outlet box 8 in portion, and the penetration pipe 10 being connected between outlet box 8 and controller 9, access controller 9.
In the present embodiment, transformer body is designed using resistance to shorting structure；The sealing of signal wire should be also reserved on case lid
Slot；Fuel tank side needs to weld the bracket for fixing on-load voltage regulation switch controller.
In conclusion the more traditional load tap changing distribution transformer of non-maintaining on-load regulator transformer provided by the utility model
With the advantages such as small in size, at low cost, intelligent and non-maintaining, especially suitable for voltage rating 10kV, capacity 630kVA and with
Under power distribution station, pressure regulation tapping gear can be changed step by step automatically, handoff procedure can keep the confession of low-pressure side according to voltage change
Electric continuity.
It is understood that embodiment of above is merely to illustrate that the principles of the present invention and uses exemplary
Embodiment, however the utility model is not limited thereto.For those skilled in the art, this is not being departed from
In the case where the spirit and essence of utility model, various changes and modifications can be made therein, these variations and modifications are also considered as this reality
With novel protection scope.
Claims (10)
1. a kind of non-maintaining load tap changing distribution transformer, comprising: fuel tank, iron core, the low pressure side line being wound on the iron core
Circle and high pressure lateral coil, and the on-load voltage regulating switch being electrically connected with the high pressure lateral coil, which is characterized in that described to there is load to adjust
Compressing switch includes: pressure regulation major loop and pressure regulation transition circuit, and the two is in parallel；It is provided with and is sequentially connected electrically on the pressure regulation major loop
Major loop switching switch and major loop select switching group, the pressure regulation transits back road and is provided with transiting back of being sequentially connected electrically
Road switching switch, transition resistance and transition loop choice switching group；Multiple shunting taps are drawn on the high pressure lateral coil, are passed through
The respective contacts in switching group and the transition loop choice switching group are selected to be electrically connected with the major loop after lead, to pass through
The on-load voltage regulating switch changes the tap output of the high pressure lateral coil to realize on-load voltage regulation；The major loop switching switch
It switchs with the transition loop switch and is made of vacuum interrupter, the major loop selection switching group and the transition circuit are selected
It selects switching group and is all made of permanent-magnet linear driving mechanism.
2. distribution transformer according to claim 1, which is characterized in that the high pressure lateral coil is along its head end to end
Direction is in turn divided into basic coil L0, voltage regulation coil L3, voltage regulation coil L2 and voltage regulation coil L1, wherein basic coil L0 and tune
Crimping circle L3 is directly electrically connected, and voltage regulation coil L2 and voltage regulation coil L1 are directly electrically connected；5 are drawn on the high pressure lateral coil often
Advise shunting tap, respectively routine shunting tap X1 to X5, wherein end and tune of the routine shunting tap X5 from basic coil L0
The tie point of the head end of crimping circle L3 is drawn, and conventional shunting tap X4 is drawn from the end of voltage regulation coil L3, conventional shunting tap
X3 is drawn from the head end of voltage regulation coil L2, and conventional shunting tap X2 is from the end of voltage regulation coil L2 and the head end of voltage regulation coil L1
Tie point is drawn, and conventional shunting tap X1 is drawn from the end of voltage regulation coil L1.
3. distribution transformer according to claim 2, which is characterized in that voltage regulation coil L3, voltage regulation coil L2 and line pressure regulator
The turn ratio for enclosing L1 is 2:1:1.
4. distribution transformer according to claim 2, which is characterized in that the major loop selection switching group includes: switch
K1, switch K2 and switch K3, the transition loop choice switching group include: switch K4 and switch K5；In switch K1 to switch K5
Each switch include: pressure regulation electromagnet, the moving contact that is connected with the pressure regulation electromagnet, and with the moving contact phase
Matched two static contacts, described two static contacts are respectively upper contact head and lower contact, and the upper contact head and the lower contact
It is separately positioned on the two sides of the moving contact.
5. distribution transformer according to claim 4, which is characterized in that
In major loop selection switching group, the upper contact head of switch K1 is electrically connected with routine shunting tap X5, lower contact with it is normal
Rule shunting tap X4 electrical connection, moving contact are electrically connected with routine shunting tap X3；The upper contact head of switch K2 and conventional shunting tap
X3 electrical connection, lower contact is electrically connected with routine shunting tap X2, moving contact is electrically connected with the upper contact head of switch K3；Under switch K3
Contact is electrically connected with routine shunting tap X1, moving contact is electrically connected with one end of major loop switching switch, and major loop switching is opened
The other end of pass is electrically connected with the end of the high pressure lateral coil；Switch K1 to switch K3 is selected under no current state
It selects；
In the transition loop choice switching group, the upper contact head of switch K4 is electrically connected with routine shunting tap X5, lower contact with
Conventional shunting tap X3 electrical connection, moving contact are electrically connected with the upper contact head of switch K5；The lower contact of switch K5 and conventional tap are taken out
Head X2 electrical connection, moving contact are electrically connected with one end of transition resistance R, and the other end of transition resistance R is opened with transition loop switch
One end of pass is electrically connected, and the other end of transition loop switch switch is electrically connected with the end of the high pressure lateral coil；Switch K4 and
Switch K5 is selected under no current state.
6. the distribution transformer according to any one of claim 3-5, which is characterized in that first draw on the high pressure lateral coil
Out for coil outer connection 11 coil taps, respectively coil tap a1 to a11,11 coil taps according still further to
Predetermined manner is electrically connected respectively with described 5 conventional shunting taps to adjust coil ampere-turn equilibrium.
7. distribution transformer according to claim 6, which is characterized in that basic coil L0 is divided into more first of the number of turns
Part and the less second part of the number of turns, and power supply is accessed in one end of basic coil L0 first part；Voltage regulation coil L3 is divided into
The identical first part of the number of turns and second part；
Coil tap a1 is electrically connected with the other end of basic coil L0 first part, one end of coil tap a2 and voltage regulation coil L2
Electrical connection, coil tap a3 are electrically connected with the other end of voltage regulation coil L2, coil tap a4 and voltage regulation coil L3 first part
One end electrical connection, coil tap a5 are electrically connected with the other end of voltage regulation coil L3 first part, coil tap a6 and basic coil
One end of L0 second part is electrically connected, and coil tap a7 is electrically connected with the other end of basic coil L0 second part, coil tap
A8 is electrically connected with one end of voltage regulation coil L1, and coil tap a9 is electrically connected with the other end of voltage regulation coil L1, coil tap a10 with
One end of voltage regulation coil L3 second part is electrically connected, and coil tap a11 is electrically connected with the other end of voltage regulation coil L3 second part；
Wherein, coil tap a6 is electrically connected with coil tap a1, coil tap a7 and coil tap a4 electrical connection, coil tap a3 and line
Tap a8 electrical connection is enclosed, coil tap a5 is electrically connected with coil tap a10；
Conventional shunting tap X1 is electrically connected with coil tap a9；Conventional shunting tap X2 is electrically connected with coil tap a8；Conventional point
Tap X3 is met to be electrically connected with coil tap a2；Conventional shunting tap X4 is electrically connected with coil tap a11；Conventional shunting tap X5 with
Coil tap a7 electrical connection.
8. distribution transformer according to any one of claims 1-5, which is characterized in that two upper clamping pieces of the iron core
It is detachably connected with two cross-arms of interval pre-determined distance respectively, and two cross-arms and two upper clamping pieces are arranged substantially perpendicular to each other；
The on-load voltage regulating switch is placed on two cross-arms, and it is attached that installation is provided between each cross-arm and on-load voltage regulating switch
Part, the installation attachment are used to carry out effective position to the on-load voltage regulating switch.
9. distribution transformer according to claim 8, which is characterized in that on two upper clamping pieces of the iron core with the cross
It carries on a shoulder pole and is fixed with screw rod at corresponding position, the first nut is cased on the screw rod；Position corresponding with the screw rod on the cross-arm
The place of setting is provided with through-hole, after the screw rod passes through the through-hole on the cross-arm, is realized and is locked by the second nut；First spiral shell
Mother is for leveling the cross-arm.
10. distribution transformer according to any one of claims 1-5, which is characterized in that the distribution transformer also wraps
Include: the side of fuel tank is arranged in the controller of on-load voltage regulating switch；The control terminal and secondary line of the on-load voltage regulating switch
Electrical connection, the secondary line are upward through case lid, and by the outlet box at the top of the case lid, and are connected to the outlet box
With the penetration pipe between the controller, the controller is accessed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920368177.5U CN209544128U (en) | 2019-03-21 | 2019-03-21 | A kind of non-maintaining load tap changing distribution transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920368177.5U CN209544128U (en) | 2019-03-21 | 2019-03-21 | A kind of non-maintaining load tap changing distribution transformer |
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| CN209544128U true CN209544128U (en) | 2019-10-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111026216A (en) * | 2019-12-18 | 2020-04-17 | 国网河南省电力公司检修公司 | Station is with becoming automatic voltage regulation device |
| CN113744981A (en) * | 2021-08-05 | 2021-12-03 | 广东云舜综合能源科技有限公司 | Trip gear voltage regulating transformer |
-
2019
- 2019-03-21 CN CN201920368177.5U patent/CN209544128U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111026216A (en) * | 2019-12-18 | 2020-04-17 | 国网河南省电力公司检修公司 | Station is with becoming automatic voltage regulation device |
| CN113744981A (en) * | 2021-08-05 | 2021-12-03 | 广东云舜综合能源科技有限公司 | Trip gear voltage regulating transformer |
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